Alert archive / Massachusetts / Flash Flood Warnings in 2017

Flash Flood Warning 5, NWS Boston/Norton, MA

July 12, 2017Bristol County, Norfolk County, Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Jul 12, 2017, 2:53 PM EDT for Bristol County, Norfolk County, Massachusetts; Providence County, Rhode Island. It was in force for 112 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 12, 2017, 2:53 PM EDT (18:53 UTC)
Expired: Jul 12, 2017, 4:45 PM EDT
In force: 112 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Bristol County, MA, Norfolk County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 27 km from the middle of the area, began a volume at 18:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 12, 4:06 PM EDT	FLOOD	Central Falls, RI	3 FEET OF STANDING WATER WITH 2 CARS STUCK IN FLOOD WATERS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 6.9 hours before the alert went out and 128 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 358 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

358 
WGUS51 KBOX 121853
FFWBOX
MAC005-021-RIC007-122045-
/O.NEW.KBOX.FF.W.0005.170712T1853Z-170712T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Taunton MA
253 PM EDT WED JUL 12 2017

The National Weather Service in Taunton has issued a

* Flash Flood Warning for...
  Southwestern Norfolk County in eastern Massachusetts...
  Northwestern Bristol County in southeastern Massachusetts...
  Northeastern Providence County in Rhode Island...

* Until 445 PM EDT

* At 251 PM EDT, Doppler radar indicated a cluster of nearly 
  stationary thunderstorms producing heavy rain within the warned 
  area. Radar estimates that some locales have received over an inch 
  of rainfall. Flash flooding is expected to begin shortly. Areas of 
  particular concern are urban and poor drainage areas. 

* Some locations that will experience flooding include...
  Providence, Pawtucket, East Providence, Woonsocket, Cumberland,
  North Providence, Johnston, North Attleborough, Attleboro,
  Smithfield, Lincoln, Central Falls, Bellingham, Burrillville,
  Seekonk, North Smithfield, Rehoboth, Wrentham, Glocester and
  Blackstone.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Flooding will occur quickly and could become life threatening for
those who try to drive through flooded roads or underpasses. Find
alternate routes and avoid flooded areas.

A Flash Flood Warning means that flooding will occur quickly, and
could be life threatening for those who try to drive through flooded
roads or underpasses. Find alternate routes. Those near small streams
need to get to higher ground immediately.

&&

LAT...LON 4183 7157 4201 7161 4202 7155 4201 7151
      4202 7149 4205 7129 4201 7129 4186 7125

$$

NMB

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 10:15 AM EDT	Flash Flood Watch	BOX	Bristol, Essex, Hampden, Middlesex, Norfolk, Plymouth and 2 more	11 hr
Jul 12, 11:01 AM EDT	Special Weather Statement	BOX	Suffolk	29 min
Jul 12, 12:01 PM EDT	Special Weather Statement	BOX	Franklin	44 min
Jul 12, 12:05 PM EDT	Special Weather Statement	BOX	Worcester	40 min
Jul 12, 12:24 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Worcester	51 min
Jul 12, 12:25 PM EDT	Areal Flood Advisory	BOX	Franklin	65 min
Jul 12, 12:36 PM EDT	Special Weather Statement	BOX	Hampden	39 min
Jul 12, 12:44 PM EDT	Areal Flood Advisory	BOX	Middlesex, Norfolk, Worcester	61 min
Jul 12, 12:46 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk	44 min
Jul 12, 12:50 PM EDT	Special Weather Statement	BOX	Middlesex	40 min
Jul 12, 12:53 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	67 min
Jul 12, 1:19 PM EDT	Areal Flood Advisory	BOX	Hampden	56 min
Jul 12, 1:22 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	38 min
Jul 12, 1:39 PM EDT	Special Weather Statement	BOX	Worcester	51 min
Jul 12, 1:39 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth	51 min
Jul 12, 1:41 PM EDT	Special Weather Statement	BOX	Middlesex	49 min
Jul 12, 1:47 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Jul 12, 1:52 PM EDT	Areal Flood Advisory	BOX	Bristol, Norfolk, Plymouth	53 min
Jul 12, 2:35 PM EDT	Areal Flood Advisory	BOX	Bristol, Plymouth	55 min
Jul 12, 3:04 PM EDT	Areal Flood Advisory	BOX	Middlesex, Norfolk, Worcester	56 min
Jul 12, 3:10 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	50 min
Jul 12, 3:26 PM EDT	Flash Flood Warning	BOX	Bristol	2 hr
Jul 12, 3:36 PM EDT	Special Weather Statement	BOX	Hampshire	39 min
Jul 12, 3:44 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	35 min
Jul 12, 3:53 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Plymouth	34 min
Jul 12, 4:01 PM EDT	Special Weather Statement	BOX	Hampden	44 min
Jul 12, 4:06 PM EDT	Areal Flood Advisory	BOX	Bristol, Plymouth	114 min
Jul 12, 4:16 PM EDT	Special Weather Statement	BOX	Plymouth	44 min
Jul 12, 4:18 PM EDT	Areal Flood Advisory	BOX	Norfolk, Plymouth, Suffolk	57 min
Jul 12, 4:24 PM EDT	Special Marine Warning	BOX		66 min
Jul 12, 4:32 PM EDT	Special Marine Warning	BOX		58 min
Jul 12, 4:36 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	114 min
Jul 12, 4:39 PM EDT	Special Marine Warning	BOX		66 min
Jul 12, 4:48 PM EDT	Special Weather Statement	BOX	Middlesex	42 min
Jul 12, 4:53 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	112 min
Jul 12, 5:00 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex	60 min
Jul 12, 5:19 PM EDT	Areal Flood Advisory	BOX	Hampden, Worcester	56 min
Jul 12, 5:21 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	35 min
Jul 12, 5:36 PM EDT	Flash Flood Warning	BOX	Worcester	114 min
Jul 12, 5:36 PM EDT	Special Weather Statement	BOX	Middlesex	39 min
Jul 12, 5:42 PM EDT	Flash Flood Warning	BOX	Middlesex	2 hr
Jul 12, 6:10 PM EDT	Special Weather Statement	BOX	Middlesex	35 min
Jul 12, 6:20 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Suffolk	25 min
Jul 12, 6:29 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Suffolk	2 hr
Jul 12, 6:39 PM EDT	Special Weather Statement	BOX	Norfolk	36 min
Jul 12, 7:05 PM EDT	Special Weather Statement	BOX	Suffolk	25 min
Jul 12, 7:35 PM EDT	Areal Flood Warning	BOX	Middlesex	115 min
Jul 12, 12:34 PM EDT	Special Weather Statement	BOX	Bristol	41 min
Jul 12, 2:32 PM EDT	Special Weather Statement	BOX	Providence	43 min
Jul 12, 3:03 PM EDT	Special Weather Statement	BOX	Providence	42 min
Jul 12, 3:47 PM EDT	Areal Flood Advisory	BOX	Kent, Providence	58 min
Jul 12, 4:26 PM EDT	Flash Flood Warning	BOX	Kent, Providence	2 hr
Jul 12, 4:26 PM EDT	Special Weather Statement	BOX	Kent	49 min
Jul 12, 4:38 PM EDT	Severe Thunderstorm Warning	BOX	Kent, Washington	31 min

Nearby

Flash Flood Warnings in Massachusetts, 2017 Flash Flood Warnings in Rhode Island, 2017 Every flash flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.